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uestion
The generator at a power plant produces AC at 25,000 V. A transformer steps this up to 375,000 V for transmission over power lines. If there are 2,100 turns of wire in the input coil of the transformer, how many turns must there be in the output coil?
Question
Compute the frequency (in MHz) of an EM wave with a wavelength of 8.5 in. (0.2159 m).
Question
The angles used in Snell’s law are always
A Right angles
B measured between the ray of light and the normal line
C obtuse angles
D measured between the ray of light and the tangent line
The higher the index of refraction the
A More expensive the material
B Less we know about the material
C The less dense the material
D The more dense the material
Snell’s law helps us to determine
A How much time light spends in a material
B The angle by which light bends when entering a different material
C The speed of light in a vacuum with standard temperature and pressure
D Spherical aberration of a telescope.
If one measures the index of refraction to be 1.1, this material would be
A More dense than vacuum
B More dense than acrylic
C More dense than water
D Less dense than air
The higher density a material the
A Faster the speed of light
B Slower the speed of light
C Speed of light stays the same
D Speed of light cannot be determined
Question
Reference
Pirnot, T. L. (2014). Mathematics all around (5th ed.). Boston, MA: Pearson Education.
A single card is drawn from a standard 52 card deck, Find P (club/red)
A. 0
B. 1
C. 1/2
D. 3/4
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